Yuan Zheng-Quan, Li Feng, Wang Deng-Gao, Wang Yong, Zhang Ping
Epidemic Prevention Brigade, General Logistics Department, PLA, Beijing 100039, China.
Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi. 2004 Aug;22(4):267-9.
To investigate the effect of low intensity and very high frequency (VHF) electromagnetic radiation (170 MHz) on nervous system function and serum enzymes and immune function in human subjects with occupational exposure to VHF.
To measure the intensity of VHF and other environmental factors on the spot, to hold the questionnaire about chief complaints, to examine the rheoencephalography and the neurobehavior function, to analyze ALT, AST, ALP and LDH, and IgA, IgM and IgG in experimental group and control group.
The intensity of VHF (direction of antenna: 0 degrees, 10 m and 135 degrees, 20 m) was higher than that of national standard on-the-spot. The incidences of symptoms such as headache, insomnia and amnesia etc. was significantly higher in experimental group (P < 0.01). Rheoencephalography indicated that the raising time of both left [(0.155 3 +/- 0.057 9) s] and right [(0.154 1 +/- 0.059 2) s] in the experimental group after exposure were significantly longer than before exposure [(0.104 4 +/- 0.030 2) s, (0.103 2 +/- 0.030 4) s respectively] or in the control [(0.118 5 +/- 0.056 8) s, (0.117 7 +/- 0.057 5) s respectively, (P < 0.01)]. Neurobehavior function test showed that digital symbol, digital span and pursuit aiming test were decreased after exposure in the experimental group (P < 0.01). Serum enzyme analysis showed that AST, ALP and LDH were significantly increased after exposure in the experimental group (P < 0.01). No marked change was found in IgA level, while the levels of IgM and IgG after exposure in the experimental group especially the latter were significantly increased (P < 0.01).
Low-intensity VHF radiation can decrease the nervous system function in occupationally exposed personnel and induce increase in some kinds of enzymes and immunoglobulins.
探讨低强度甚高频（VHF，170MHz）电磁辐射对职业接触VHF人群神经系统功能、血清酶及免疫功能的影响。
现场测量VHF强度及其他环境因素，发放主诉问卷，检查脑血流图和神经行为功能，分析实验组和对照组的谷丙转氨酶（ALT）、谷草转氨酶（AST）、碱性磷酸酶（ALP）、乳酸脱氢酶（LDH）以及免疫球蛋白A（IgA）、免疫球蛋白M（IgM）和免疫球蛋白G（IgG）。
现场VHF强度（天线方向：0度，10米处及135度，20米处）高于国家标准。实验组头痛、失眠、失忆等症状的发生率显著高于对照组（P<0.01）。脑血流图显示，实验组暴露后左右脑血流上升时间[分别为（0.155 3±0.057 9）秒和（0.154 1±0.059 2）秒]显著长于暴露前[分别为（0.104 4±0.030 2）秒和（0.103 2±0.030 4）秒]或对照组[分别为（0.118 5±0.056 8）秒和（0.117 7±0.057 5）秒，P<0.01]。神经行为功能测试表明，实验组暴露后数字符号、数字广度和追踪瞄准测试成绩下降（P<0.01）。血清酶分析显示，实验组暴露后AST、ALP和LDH显著升高（P<0.01）。IgA水平未见明显变化，而实验组暴露后IgM和IgG水平，尤其是后者显著升高（P<0.01）。
低强度VHF辐射可降低职业接触人员的神经系统功能，并导致某些酶和免疫球蛋白升高。
